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GOODWILL AND OTHER INTANGIBLE ASSETS Additional Information (Details) - USD ($)
9 Months Ended 12 Months Ended
Sep. 30, 2018
Dec. 31, 2017
Dec. 31, 2016
Segment Reporting Information [Line Items]      
GOODWILL $ 429,818,000 $ 543,903,000 $ 527,150,000
Goodwill, Impairment Loss 105,000,000    
Other Businesses [Member]      
Segment Reporting Information [Line Items]      
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) $ 34,000,000 $ 0  
Reporting unit, percentage of fair value in excess of carrying amount 15.00%    
Selling, General and Administrative Expenses [Member]      
Segment Reporting Information [Line Items]      
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) $ 34,000,000